English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/37078
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Variation in age-structured vital rates of a long-lived raptor: Implications for population growth

AuthorsSergio, Fabrizio ; Tavecchia, Giacomo ; Blas, Julio ; López, Lidia; Tanferna, Alessandro; Hiraldo, F.
Issue DateMar-2011
CitationBasic and Applied Ecology 12 (2011) 107–115
AbstractAge-structured variation in multiple vital-rates is a fundamental determinant of population growth, with important implica- tions for conservation management. However, for many long-lived vertebrates such as birds of prey, such variation has been usually examined in shorter-lived species. Here, we investigate the pattern of age-related variation in fitness components and its repercussions on population growth for a migratory raptorial bird, the black kite (Milvus migrans), with a longer lifespan than most other previous model species. Both survival and offspring production varied along the lifespan in conjunction with the sequence of major life history stages: they were lowest during the initial years of life, increased steeply during the period of progressive incorporation of floaters in the breeding sector of the population (age 2–6), levelled off between 7 and 11 years of life, declined with senescence after age 12, and increased again for the few high-quality individuals capable of reaching age 18–25. This pattern was more gradual, asymmetrical and protracted than in shorter-lived species. Matrix modelling estimated a stationary growth rate, which was more sensitive to changes in survival in early life rather than to survival in adult life, contrary to expectations for long-lived species. Our results highlight: (1) a growing appreciation of the importance of juvenile survival for population dynamics, (2) the need for caution on the generalization that population-trends of long-lived species are primarily determined by adult survival, and (3) that the trajectory of the breeding populations of migratory species may be determined by environmental variation experienced in early life in staging areas located far away from breeding areas
Die altersbedingte Variation bei vielen Vitalparametern ist ein fundamentaler Faktor bei der Bestimmung des Populationswachstums mit wichtigen Auswirkungen auf das Naturschutzmanagement. Dennoch wurde bei langlebigen Wirbeltieren, wie z. B. Greifvögeln, diese Variation gewöhnlich nur bei kurzlebigeren Arten untersucht. Hier untersuchten wir die Muster der altersbedingten Variation der Fitness-Komponenten und ihre Rückwirkungen auf das Populationswachstum bei einem ziehenden Greifvogel mit einer längeren Lebenserwartung als die bisher untersuchten Modellarten, dem Schwarzmilan
Publisher version (URL)http://www.sciencedirect.com/science
Appears in Collections:(EBD) Artículos
(IMEDEA) Artículos
Files in This Item:
File Description SizeFormat 
sergio travecchia blas et al _mn survival 2011 basicappecol 12_107-115.doc602,5 kBMicrosoft WordView/Open
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.